diff --git a/lmkd.cpp b/lmkd.cpp
index 47f5229..3671766 100644
--- a/lmkd.cpp
+++ b/lmkd.cpp
@@ -469,7 +469,7 @@ enum vmstat_field {
     VS_FIELD_COUNT
 };
 
-static const char* const vmstat_field_names[MI_FIELD_COUNT] = {
+static const char* const vmstat_field_names[VS_FIELD_COUNT] = {
     "nr_free_pages",
     "nr_inactive_file",
     "nr_active_file",